Portion of a shoe outsole



FIG. 1 is a front perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a rear perspective view thereof; and,

FIG. 3 is a top view thereof.

The uneven broken line showing the remainder of the shoe outsole is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe outsole, as shown and described. 